. >> the other part of the story so many facets to it is the corruption allegations at scotland yard, the police agency. we're starting today's testimony with the police. >> reporter: that's right. two of the top cops in the country, former metropolitan police commissioner already resigned and then john yates in charge of the phone hacking investigation review he too resigned yesterday. this is how far the scandal has gone. it cast a shadow over scotland yard and everyone now especially lawmakers are trying to get to the bottom of just how much corruption was there, how cozy was the relationship between news of the world and scotland yard. >> it's going to have implications for david cameron's government. andy coleson is being alleged to have known about this when he was heading up the newspaper. >> reporter: this goes to show how it goes to the very hard of politics here basically andy was the chief spin doctor for prime minister david cameron so this is a major embarrassment for him and it's so bad that he's coming back to england early from his trip to south africa specifically to